197results about How to "Simple layout" patented technology

The present invention provides a technique capable of simplifying a layout structure of a semiconductor device having a semiconductor memory section in which an input port and an output port are separated from each other, and which includes a bypass function. In a semiconductor memory device to be used as a semiconductor memory section of the semiconductor device, in a bypass mode, an output buffer outputs input data transmitted through a bypass line, extending from an input buffer circuit to the output buffer circuit, to an output port. In the layout structure of the semiconductor memory device, in plan view, a memory cell array is arranged between the input buffer circuit and the output buffer circuit, and a bypass line is arranged through between the memory cell arrays.

The invention discloses a method for controlling leakage of a grouting treatment vertical type asphalt concrete core wall earth-rock dam. The method comprises the steps of first collecting, arranging and analyzing dam technical data, and drawing up a grouting range, grouting hole arrangement and grouting curtain body design indexes; carrying out slurry tests and on-site grouting tests; selecting a device according to slurry test results, manufacturing grouting slurry, performing segmentation and row drilling on an upstream transition layer at a dam crest, and sequentially drilling upstream row grouting holes, middle row grouting holes and downstream row grouting holes in the upstream transition layer from one side of an upstream rockfill material dam shell to an asphalt concrete core wall; and finally performing hole sealing treatment after quality inspection. The method has simplicity in arrangement; under the conditions that a reservoir cannot be emptied, the problem of the leakage of the vertical type asphalt concrete core wall earth-rock dam can be effectively solved, the reservoir can run normally, and dam body safety is guaranteed. Engineering project implementation treatment proves that the method is feasible, safe, reliable and good in leakage treatment effect.

The invention relates to a multi-sensor information fusion-based wireless fire alarm system. The system comprises an industrial personal computer, a wireless transmission unit and a control unit, wherein the wireless transmission unit is used for connecting the industrial personal computer with the control unit; the control unit comprises a monitoring server, an analog-digital converter, an active low-pass filter and a plurality of data sensors; the multiple data sensors are connected with the monitoring server through the respective active low-pass filter and analog-digital converter respectively; the monitoring server, on one hand, is used for receiving data of the analog-digital converter, and on the other hand, is used for analyzing and processing acquired information by using a fuzzy reasoning algorithm-based multi-sensor information fusion technology and performing judgment processing on the acquired information according to a fusion database and an expert knowledge base; previously recorded data sets acquired by the multiple data sensors are stored in the fusion data base; different fuzzy reasoning rules corresponding to different application scenes are stored in the expert knowledge base. The occurrence of a fire disaster can be accurately and quickly judged.

The invention discloses a tray, a tray assembly, a battery pack assembly and a vehicle. The tray comprises a bottom plate and a frame, wherein the bottom plate comprises a plurality of sub bottom plates, runners are arranged in at least one part of sub bottom plates in the plurality of sub bottom plates, a battery module is suitably arranged on the sub bottom plates provided with the runners, and the frame is arranged at a peripheral edge of the bottom plate. By the tray, the volume requirement of a cavity for accommodating the battery module can be reduced, the runner arrangement is simpler, a water-cooling mode and an air-cooling mode can be simultaneously compatible, particularly in the water-cooling mode, a cooling liquid can directly flows outwards even the cooling liquid is leaked, short circuit of the battery module is prevented, the battery module is safer to use, and a relatively good protection effect can be played on the battery module.

The invention discloses an environment-adaptive device-free target positioning method. The environment-adaptive device-free target positioning method includes the steps that a positioning system is established, and the value of strength of a received signal of a receiving end in a link formed between every two wireless communication nodes is obtained; a positioning area is divided into N lattice points, and a sparse positioning model is constructed according to the influence of occurrence of a target at a certain lattice point on the value of strength of the received signal of the receiving end in each link; the weight of influence of changes of the strength of the signal at each lattice point on the value of strength of the received signal of the receiving end in the corresponding link is determined according to an elliptical shadow model to obtain an ideal dictionary; the ideal dictionary is updated and sparsely restored alternately according to changes of the value of strength of the received signal of the receiving end in each link; the position of the lattice point corresponding to a non-zero value in updated sparse vectors is the position of a positioned device-free target. Through the environment-adaptive device-free target positioning method, online dynamic dictionary adjustment and sparse restoration can be performed according to changes for adapting to the environment, changes of the environment can be adapted to dynamically, misjudgment of a target is effectively avoided, and positioning precision is effectively improved.

The invention relates to the field of electric power energy-storage utilization, in particular to a micro-miniature compressed air energy-storage system combining compressed air and hydraulic pressure. The micro-miniature compressed air energy-storage system comprises a gas storage tank, a compressor unit and an expander unit, wherein energy conversion of both the compressor unit and the expander unit is achieved through a corresponding power generator or electric motor; a gas outlet of the compressor unit is communicated with a gas inlet of the gas storage tank, and a first switch part is arranged on a connecting pipeline between the gas inlet and the gas outlet; a gas inlet of the expander unit is communicated with a gas outlet of the gas storage tank, and a second switch part is arranged on a pipeline; the micro-miniature compressed air energy-storage system further comprises a liquid storage tank; a liquid inlet pipeline and a liquid outlet pipeline are arranged on the liquid storage tank and are communicated with the gas storage tank to form a circulatory liquid flow loop; and a pressurization and / or constant pressure component is arranged on the liquid inlet pipeline, and a hydraulic pump used for adding a liquid into the gas storage tank is arranged on the liquid outlet pipeline. The micro-miniature compressed air energy-storage system is high in energy conversion efficiency as well as reliable and stable in operation, has the advantages of low construction cost, high energy storage efficiency, good environmental adaptation and the like, and is broad in application prospect.

A semiconductor device includes a substrate where a cell region and a contact region are defined, an isolation region and an active region disposed alternately in the contact region, transistors configured to include a gate formed over the substrate and a source and a drain formed in the active region at both sides of the gate, in the contact region, memory blocks configured to include conductive lines stacked over the substrate and formed over the transistors, the conductive lines being extended from the cell region to the contact region in the direction crossing over the isolation region and the active region, and contact plugs formed between the memory blocks in the contact region.

The invention aims to provide an engine based on a vane-type metal-water reaction propulsion unit. The engine comprises a solid grain, a first combustion chamber, a second combustion chamber, a jet pipe, a water inlet pipe and helical blades, wherein the water inlet pipe passes through the solid grain, the first combustion chamber and the second combustion chamber; one end of the water inlet pipe is installed in the solid grain and the other end is installed in the position at the rear side of the second combustion chamber and close to the jet pipe by a water pipe support; the water inlet pipe is provided with blowholes; and the helical blades are installed on the water inlet pipe. The engine has the following advantages: the water inlet pipeline is simply arranged and does not occupy the volume outside the combustion chambers, thus ensuring the structure of the whole propulsion unit to be compact; the incoming water directly reaches the center of the flow field, thus greatly improving the reaction rate; the water jet amount is determined according to the number of the jet orifices and the diameter of the centrifugal nozzle and is easily controlled; and the arrangement of the helical blades effectively enhances the turbulence in the combustion chambers, thus remarkably improving the blending effect.

A driving circuit for use in an LCD is proposed. The driving circuit includes a first clock signal input, a second clock signal input, a first TFT, and a controlling terminal. The controlling terminal is connected to a gate of the first TFT. The first TFT is placed between the controlling terminal and the first clock signal input. The controlling terminal is placed between the first TFT and the second clock signal input. A parasite capacitor is formed in the first TFT. The driving circuit further includes a suppression capacitor placed between the second clock signal input and the controlling terminal. The suppression capacitor is used for adjusting a potential of the controlling terminal in response to transitions of the first clock signal and the second clock signal. The present invention provides a simplified layout, occupies less side area of the LCD, and upgrades image quality of the LCD.

The invention relates to a method for simultaneously tracking multiple equipment-free objects on the basis of a dynamic clustering algorithm by the wireless network technology. A plurality of wireless sensor nodes mutually communicating are arranged on an indoor ceiling, and each node serves as a wireless radio frequency emitter and can serve as the wireless radio frequency receiver simultaneously; when the object is not moved, signal intensity received between nodes is stable, otherwise, dynamic clustering is carried out according to different influences of signal intensity of multiple equipment-free objects on different nodes. A corresponding cluster is generated when having influence, and the node with the highest residual energy in the cluster is chosen as a cluster head. The cluster head of each cluster collects the vibration situation of signal intensity of each node and calculates the object position in the cluster by a probability coverage algorithm.

The invention relates to a wireless monitoring system based on improved BP neural network PID controller. According to the work flow of the system, an industrial personal computer accesses an MMF module through a wireless network which comprises a Wi-Fi module, and monitors the work state of a resistance furnace temperature device in real time; and the MMF module adjusts and controls output according to an improved BP neural network PID control algorithm, so that temperature change quickly reaches a steady state on the premise of small overshoot. The system provided by the invention is composed of a hardware system and software implanted into the MMF module. The hardware system is composed of a management unit, a wireless transmission unit and a control unit. According to the invention, a Wi-Fi network is used as a transmission medium; the system has the advantages of simple stationing and short network-laying construction period; and the destructed network can be easily recovered.

The invention relates to an actuating device 1 for a rotatable closure part of a valve, in particular a pneumatically or hydraulically actuable rotary drive for a disc valve or throttle valve, according to the preamble of claim 1. The invention is based on the problem of providing an actuating device of the generic type which is of simple construction, has high stability in the region of the mounting of the drive shaft and in the region of the rectilinear and curved guide which is arranged in the driving piston, and has a stroke-independent, direct rotary-angle limiting means with accuracy which is as great as possible. This is achieved by virtue of the fact that the drive shaft (6) is mounted radially on two sides in a bearing sleeve (2.4) which engages into the housing (2), is connected fixedly to the latter and ends in the latter, that the piston skirt (4.2; 40b.2) is mounted axially displaceably and radially on the outer circumferential surface of the bearing sleeve (2.4), and that the at least one drive pin (12) experiences a stroke-independent, direct limiting of the rotational movement thereof about the rotational axis (A) by way of stop means (2.4a) which are provided in the bearing sleeve (2.4).

The invention relates to the technical field of water pile sinking construction, in particular to a construction method for carrying out pile sinking based on a floating walking platform. The construction method comprises the following steps: pulling a floating platform to a pile sinking construction position, precisely positioning the floating platform, inserting a supporting post into a seabed for fixing the floating platform to the sea by virtue of matching of a lifting jack, a fixed lock and a movable block; taking the floating platform as a pile sinking construction platform to carry out pile sinking construction; and after the construction of the section is completed, pulling the floating platform out of the supporting post by virtue of reverse jacking of the lifting jack, and pulling the floating platform to the next construction section to sink and fix for carrying out pile sinking construction until construction of all pile locations is completed. According to the construction method, the floating platform can be used for quickly inserting the platform into the seabed or pulling the platform out of the seabed by virtue of matching of the supporting post, the lifting jack, the fixed lock and the movable block, so that the operation process is simple and convenient, the operation can be completed without a great deal of manpower and material resources, and therefore, the construction method has a great popularization value.

The invention discloses a self-pressurization protecting device and method thereof for keeping an expansive soil cut slope stable. The device comprises an anchor rod, a first circular plate, a second circular plate and a high-strength spring, the anchor rod is sleeved with the first circular plate and the second circular rod, the high-strength spring is arranged between the first circular plate and the second circular plate, a nut is arranged on the first circular plate, and the anchor rod is fixedly sleeved with the nut. By means of the self-pressurization device, the problem that the expansive soil cut slope tends to be unstable under the action of atmosphere is solved, the device is applicable to various types of expansive soil, meanwhile, the arrangement form is simple, the construction operation is simple and convenient, the device can be used for provisional protection as well, and the construction application prospect of the device is broad. The action mechanism of the protecting device conforms to the working rules of the expansive soil cut slope, and engineering characteristics of the expansive soil are taken into full consideration in the protection design; the construction efficiency is high, the arrangement is flexible, and the device is applicable to various soil layers; the device can be made of metal materials or bamboo or wood according to the protection time length, and the effect to the environment is little.

The invention discloses a pure electric light truck chassis which comprises a frame assembly, a front assembly, a rear assembly and a middle assembly, wherein the front assembly is arranged at the front end of the frame assembly, the rear assembly is arranged at the rear end of the frame assembly, and the middle assembly is arranged on the frame assembly and positioned between the front assembly and the rear assembly. According to the pure electric light truck chassis, various integrated parts are increased, an arrangement structure is optimized, electric accessories and a controller are arranged in an engine compartment, a driving motor and an air cylinder are arranged in the middle of the engine compartment, power batteries are arranged on two sides of the engine compartment, mass centers of the parts are reasonably controlled, the mounting requirements of the electric accessories are taken into full consideration, by the aid of the integrated parts, the chassis is simpler in structure and compact in arrangement, pipelines are conveniently mounted, and front and rear axle load distribution balance and reasonableness of a whole truck are ensured.

The invention discloses a retarder cooling system. The retarder cooling system comprises a radiator, an engine, a transmission, a water pump, a retarder, a heat exchanger and a temperature regulator with a first chamber and a second chamber, the first chamber is provided with a cooling water inlet and a cooling water outlet, the second chamber is provided with a hot water inlet, a big circulation port and a small circulation port, the first chamber is communicated with the second chamber through a connecting tube, and a first valve for controlling the opening or closing of the connecting tube and the like are arranged in the first chamber. Not only is the structure of the retarder cooling system simple and small, but also the action of the retarder cooling system is linked with the retarder, and thereby the retarder can be rapidly cooled.

The invention relates to a dual clutch type variable transmission device with a planetary gear train. The device consists of a sun axle, a first countershaft, a second countershaft, an intermediate shaft, dual clutches, a synchronizer, a gear and a planetary gear train, by the combination of the planetary gear train, the dual clutches, the synchronizer and the gear, automatic smooth gear shifting can be realized; and by a structure of the planetary gear train and the sharing gear, the gear number is greatly increased, and the number of shift gears can be reduced. Each pair of gears has less small speed ratio and is in a short transmission shaft structure, so the rigidness of a speed changer is improved, and the radial and axial sizes of the speed changer are reduced; a cylindrical gear is used for replacing a conical gear, so a differential mechanism has a compact structure, the manufacture cost of the differential mechanism is reduced, the gear axial pressure of the conical gear differential mechanism is eliminated, and the transmission efficiency of the differential mechanism is improved.

The invention relates to a side elevation system of an aluminum alloy house. Four aluminum alloy vertical columns are arranged on a side elevation at intervals, The portions, in the middle of the height position of the side elevation, of the four aluminum alloy vertical columns are provided with aluminum alloy beams in a connected mode, and then a bottom layer structure and a secondary layer structure of the aluminum alloy house are formed. An aluminum alloy balcony column is arranged on the outermost layer of the bottom layer, and a bottom layer auxiliary room space and a secondary layer balcony are formed through the installed aluminum alloy beams. An aluminum alloy balcony railing is arranged on the front outer side of the secondary balcony. Aluminum alloy windows are arranged on the side elevation. A roof is composed of an aluminum alloy ring beam, roof aluminum alloy secondary beams and roof aluminum alloy purlines. The roof of the side elevation is arranged to be a slope-shaped roof. An aluminum alloy wallboard combined frame is fastened to the aluminum alloy vertical columns or the aluminum alloy beams via fasteners through an aluminum alloy combined wallboard. The side elevation is simple in arrangement structure and structural connection, short in construction period and convenient to install.

The invention discloses a system and a method of load identification based on restrained edge strain extreme value coordinates, belonging to the technical field of monitoring of a board shell structure. The system comprises sensors used for measuring the strain value of the board shell structure, a data processor and a computer. The method comprises the following steps: firstly establishing a mapping relation between load point coordinates and corresponding strain extreme value coordinates; then uniformly arranging the sensors along the edge of the board shell structure, and measuring the corresponding strain extreme value coordinates of the load point to be determined; then requiring to find a sample load node at a minimum distance from the corresponding strain extreme value coordinates of the load point to be determined; and finally calculating to obtain the coordinates of the load point to be determined according to reverse distance-weighted differential method. The system has the advantages of being simple in structure and simple in arrangement of the sensors. According to the method, through the collection of strain extreme value coordinates, the determination method of the load point is simplified, and the method has universality for the structures of different material parameters.

A capacitance multiplier circuit for a filter is provided. The capacitance multiplier circuit capable of adjusting its equivalent capacitance and used in the filter, applied to a Phase Locked Loops (PLLs) circuit, includes a first operational amplifier having a positive input end for receiving an input signal, an output end, and a negative input end connected to the output end, a second operational amplifier having a positive input end, a negative input end connected to the output end of the first operational amplifier through a first resistor, and an output end connected to the negative input end through a second resistor, and a capacitor connected between the positive input end of the first operational amplifier and the output end of the second operational amplifier. An equivalent capacitance of the capacitance multiplier circuit is adjusted by configuring the ratio of the first resistor and the second resistor.

A power controller (10) includes a controller (11) and a trigger circuit (12). When the supply voltage received at terminal T1 exceeds a threshold, for example 120V RMS, the reversely connected zener diodes Z1 to Z3 conduct, turning on transistor Q1. This turns transistor Q2 off and normally open relay SW1 remains open. The switching or firing phase angle of triac THY1 is thus determined by the speed at which capacitor C4 is charged to a firing voltage by current flowing through resistors R6, R7, R8 and VR1. In this case, the trigger phase angle is when VR1 is at its maximum power setting (0 ohms), and 240V AC input power provides an effective 110V AC output at terminal T3. When the received supply voltage is less than the threshold, the transistor Q1 is turned off and the relay SW1 is activated. This resistor R6 is bypassed and causes the switch or trigger phase angle to adopt a value of about 0 degrees when VR1 is at the maximum power setting, so that the voltage at the output power terminal T3 is substantially the same as that received at terminal T1. same voltage.

The invention discloses a pressure-relieving and permeability-increasing method for drilling exploitation of an ultra-thin coal seam. The pressure-relieving and permeability-increasing method for drilling exploitation of the ultra-thin coal seam comprises the following steps that the drilling exploitation position and the thickness of an ultra-thin protective seam are determined, and drilling exploitation parameters such as the drilling exploitation width, the widths of spaced coal pillars and the distances between temporary wide coal pillars are determined; the spaced coal pillars are installed in a spaced mode according to the drilling exploitation width, and when the distance L between the adjacent temporary wide coal pillars is reached, the temporary wide coal pillars are installed; drilling exploitation continues to be conducted till the distance L between the adjacent temporary wide coal pillars is reached again; returning to the temporary wide coal pillar installed before drilling exploitation and backstopping of a goaf is conducted, the temporary wide coal pillar is damaged after backstopping, an upper rock stratum settles, and pressure is relived; and the above steps are executed circularly, a drilling exploitation working surface is continuously advanced till exploitation of the whole working surface is completed. According to the pressure-relieving and permeability-increasing method for drilling exploitation of the ultra-thin coal seam, arrangement of the working surface is simple, equipment is little, and automation is achieved conveniently; accidents such as outburst of gas or water burst under special conditions of a close distance protective seam or a near confined water protective seam are avoided; and working safety is ensured.

The embodiment of the invention provides a motorcycle engine piston cooling system and a motorcycle engine, wherein the system comprises a main journal upper bearing seat, an oil spray valve assembly, a first spray nozzle and a second spray nozzle, wherein the main journal upper bearing seat is arranged on an upper crank case, the oil spray valve assembly is arranged on the main journal upper bearing seat, the main journal upper bearing seat is provided an oil passage for circulating engine oil, the oil spray valve assembly is provided with an oil inlet, the oil passage is connected with the oil inlet, the first spray nozzle and the second spray nozzle are respectively connected with the oil spray valve assembly, the engine oil in the oil spray valve assembly can respectively flows to the first spray nozzle and the second spray nozzle, the first spray nozzle corresponds to a first piston of the engine, and the second spray nozzle corresponds to a second piston of the engine. The motorcycle engine piston cooling system provided by the embodiment of the invention has the advantages that the arrangement structure is simplified, the engine oil pressure when the engine is at low speed is increased, and meanwhile, the self intensity of a connecting rod is enabled not to be influenced.

The invention relates to an orthogonal configuration six-degree-of-freedom vibration simulation system and method of a full-vertical actuator. The system comprises an upper platform assembly, eight actuator branches, a lower platform and a real-time control hardware system, wherein the upper platform assembly and the lower platform are connected through eight actuator branches in an orthogonal configuration of a full-vertical actuator; each actuator branch is composed of a moving magnet type motor actuator, a hinge assembly and other adapters; the real-time control hardware system obtains a six-degree-of-freedom acceleration signal of the upper platform assembly collected by the sensor through A / D sampling, and calculates a control signal; a control signal is outputted to the power amplifier through the D / A to drive the actuator to move, and the actuating force of the actuator is transmitted to the upper platform assembly to enable the upper platform assembly to generate an expected vibration effect. The system is advantaged in that multi-degree-of-freedom vibration excitation in complex environments such as satellite-borne, missile-borne, airborne, ship-borne or vehicle-mounted environments is provided, and the multi-degree-of-freedom vibration excitation is used for checking the stability level and control precision of the multi-degree-of-freedom vibration excitation in the complex vibration environments or testing and calibrating the functional performance of the multi-degree-of-freedom vibration excitation.

The invention relates to a logarithmic spiral arrangement method of positive cutters on a cutterhead of a tunnel boring machine. The arrangement position of the cutters on the cutterhead of the tunnelboring machine is determined by combining m logarithmic spiral lines with n concentric circles; and the concentric circles are rotary paths of different positive cutters on the cutterhead. The logarithmic spiral line equation is rho=rho 0*e<theta cot alpha>, wherein rho is the polar diameter, indicating the distance from any point on the logarithmic spiral line to the origin of the coordinates; rho 0 is the initial polar diameter; theta is the polar angle; alpha is the spiral angle, which indicates the included angle between the polar diameter of any point on the logarithmic spiral line and the tangent direction of that point; (rho, theta) is the polar coordinate position of any point on the spiral line; and the included angle between the polar diameter of any point on the logarithmic spiral line and the tangent direction of the point is a certain value alpha, which can make the included angles beta of the moving directions of all cutters on the cutterhead and the tangent lines of thelogarithmic spiral lines at the positions where the cutters are located be equal. The arrangement method is simple, the included angles beta of all the cutters on the cutterhead can be kept consistent, and the overall stress of the cutters on the cutterhead is more uniform.

The invention discloses an all-terrain surface adaptive relief vehicle comprising a frame (10), four suspensions, and a control system. The suspensions the same in structure are symmetrically disposed on two sides of the frame. Every suspension set is hinged to the frame. The suspensions can freely rotate with certain degrees of freedom in a model machine longitudinal plane. The included angles between the suspensions and the frame change with changes in terrains, so that the function of contour adapting in the longitudinal plane is achieved. After disasters such as an earthquake occur, complex geographical environments and damage to roads thereby severely affect relief work; in order to focus on the limitation, the vehicle providing conveniences for work in the complex disaster sites is designed, and a powerful tool is provided for rescue and relief work and post-disaster reconstruction.

The invention relates to a tyre six-component force testing device for eliminating unbalance loading, the device comprises a tyre, a simulated road, a tyre positioning loading mechanism, and also comprises a base, two pillars, two six-component force sensors, an one-component force sensor, four spherical hinges and a loading plate, wherein a first pillar (2) and a second pillar (5) are fixed to the base (1), a first six-component force sensor (3) and a second six-component force sensor (6) are respectively fixed to the first pillar (2) and the second pillar (5), the upper ends of a first spherical hinge (4) and a second spherical hinge (7) are fixedly connected with the lower surface of the loading plate (8), and the lower ends of the same are respectively fixedly connected with the first six-component force sensor (3) and the second six-component force sensor (6); the tyre positioning loading mechanism (13) is arranged on the loading plate (8); the upper end of a third spherical hinge (9) is fixed to the lower surface of the loading plate (8), the upper end of the one-component force sensor (10) is fixedly connected with the third spherical hinge (9), the lower end of the same is fixedly connected with a fourth spherical hinge (11), and the fourth spherical hinge (11) is fixed to the base (1). The tyre six-component force testing device of the present invention achieves the purpose of measuring the six-component force of a huge tyre by use of small-range sensors.

The invention discloses an optical fiber grating detection device and method for measuring pressure and temperature parameters. The device comprises an optical fiber, a primary sensitive element and asecondary sensitive element; the primary sensitive element is a double-equal-thickness equal-strength cantilever beam, wherein the double-equal-thickness equal-strength cantilever beam comprises a bimetallic temperature sensitization enhancement area and a pressure measurement optical fiber bearing area; the optical fiber is arranged on the double-equal-thickness equal-strength cantilever beam; the secondary sensitive element is two sections of optical fiber bragg gratings with different grating distances which are axially separated by a predetermined distance on the optical fiber, wherein the first bragg grating is fixed on the bimetallic temperature sensitization enhancement area, and the second bragg grating is fixed on the pressure measurement optical fiber bearing area; and the wavelengths of the first bragg grating and the second bragg grating are different, and certain wavelength difference is formed. The optical fiber sensor is low in cost, stable and reliable in work, and capable of accurately detecting the contact temperature, the pressure and the environment temperature.